/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.ozone.client.checksum;

import org.apache.hadoop.hdds.scm.OzoneClientConfig;

import java.io.IOException;
import java.nio.ByteBuffer;

/**
 * Base class for computing block checksum which is a function of chunk
 * checksums.
 */
public abstract class AbstractBlockChecksumComputer {
  private ByteBuffer outByteBuffer;

  /**
   * Compute block checksum. The result can be obtained by getOutBytes().
   * @throws IOException
   */
  public abstract void compute(
      OzoneClientConfig.ChecksumCombineMode combineMode) throws IOException;

  public ByteBuffer getOutByteBuffer() {
    return outByteBuffer;
  }

  public void setOutBytes(byte[] bytes) {
    this.outByteBuffer = ByteBuffer.wrap(bytes);
  }
}
